268369921 has 2 divisors, whose sum is σ = 268369922. Its totient is φ = 268369920.

The previous prime is 268369903. The next prime is 268369949. The reversal of 268369921 is 129963862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253159921 + 15210000 = 15911^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 268369921 - 2¹¹ = 268367873 is a prime.

It is not a weakly prime, because it can be changed into another prime (268369901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134184960 + 134184961.

It is an arithmetic number, because the mean of its divisors is an integer number (134184961).

It is a Proth number, since it is equal to 4095 ⋅ 2¹⁶ + 1 and 4095 < 2¹⁶.

Almost surely, 2^268369921 is an apocalyptic number.

It is an amenable number.

268369921 is a deficient number, since it is larger than the sum of its proper divisors (1).

268369921 is an equidigital number, since it uses as much as digits as its factorization.

268369921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 268369921 is about 16381.9999084361. Note that the first 4 decimals coincide. The cubic root of 268369921 is about 645.0270773642.

The spelling of 268369921 in words is "two hundred sixty-eight million, three hundred sixty-nine thousand, nine hundred twenty-one".